Padishah Emperor Shaddam IV

Irulan is Shaddam’s daughter and the Princess Royal. She accepts the political marriage to Paul as part of her training and gently supports her father through the loss of his throne.

Shaddam IV is identified as the son of a previous Emperor; the passage offers no further detail about their personal relationship.

The Emperor’s Sardaukar have supported the Harkonnen campaign against House Atreides, but the Baron fears the Emperor’s scrutiny and conceals the circumstances of Leto’s death.

The colonel bashar serves the Emperor and is ordered to verify that Leto dies without agony. He challenges the Baron and insists on seeing Leto’s body.

Fenring and Shaddam have a long-standing friendship and political association. Shaddam orders him to assassinate Paul; Fenring refuses, saying his refusal is itself an act of friendship, and Shaddam strikes him.

Mohiam serves as the Emperor’s Truthsayer and adviser. They understand one another’s peril when they consider using Count Fenring.

The Emperor turns against Leto because the Duke’s trained forces threaten the balance of imperial power, ultimately enabling the destruction of House Atreides.

Shaddam’s covert support for the Harkonnen attack makes him an enemy of the Atreides. Paul confronts and coerces him into surrendering political power, arranging his exile to Salusa Secundus while preserving his person under an Atreides promise.